I've heard a rumor that caffeine free root beer can help with milk production while nursing. is this true?

I've not heard that.: I was not aware of caffeine free root beer in helping with milk production while nursing. Sorry I do not have the answer for that.

Not true: While there is some liquid in root beer, it's not a known stimulator of milk production. Drinking plenty of water, resting & eating well, and nursing often are the best ways to keep producing milk. Here's a helpful article by a pediatrician also certified by the international board of lactation & trained in pediatric nutrition: http://drjaygordon.Com/breastfeeding/increasing-milk-supply.Html.